Wind Flashcards
1
Q
Surface wind
A
Anemometer 10m high 33ft
Recorded on anemograph
Windvane tell you where the wind is blowing from
Calm <1kt
Gale 34-47kt
Storm 48-63kt
Hurricane 64kt
2
Q
Gust
A
10kt increase compared to average (1m)
Squall more than 1m gust
Lull, drops in wind
3
Q
Veering
Backing
A
Veering, clockwise
Backing, anti clockwise
4
Q
How do we get wind?
A
Pressure gradient and coriolis
Coriolis deflects to the right in NH
2 x omega x wind speed x sin lat
No influence between 15N and 15S
5
Q
Geostrophic wind
A
H to low
Parallel to isobars
Pressure gradient opposes Coriolis
6
Q
Buy ballot law
A
l
L ✈️ H
Wind in the back, low pressure on your left
